Method and apparatus for producing pulverulent



sept. 22, 1936. A. SOMMER Re 20,119

. METHOD AND APPARATUS FOR PRODUCING PULVERULENT BUILDING MATERIAL WITHBITUMINOUS CONSTITUENTS Original Filed Oct. 27, 1953 lNvEN 0R Lorna-:Sommari y lhm- ATTORNEY M'Sqtnisas UNITED STATES l. m01) ANDAPPARATUS-IOR PIODUUIN mmm ING NATM m m BI'IUIINOUS -CONSTITUENTSAlbsrtBomnenzarIsLBwltaclanLa-Ignor'LlucmtiomwilmingtombehaearporationolDelaware oriana s. imam. sd'lll N0im sanar-warns, ombuzama eationforrdmneooteberrmserlalle.

llclaim.

'lhis'applicationisacontinuationinpartofmy applications Serial #610.973,filed May 12, 1932, Serial #689.565, nled September 15, 1933 and ser.#612,885 filed May 25, 1933.

Thisinventiairelatestoamethodandmeans for producing a pulverulent bindercontaining bituminous materials and using preferably cement, lime or thelike.

The object of my invention is to provide a 10 method and an apparatuswhereby the materials 'used may be so treated that each individualparticle of the hydraulic base material will be covered vwith a ilne nlmof bituminous material so that the final product will be a powder very y15 much like the base material. Thusl for instance,ifPortlandcementbeusedasbase,theflnalproduct, notwithstanding itsbituminous contents. will. like Portland cement, pass through a 10.000mesh sieve without leaving an appreciable amount of residue.

Accordingly, an essential feature of my new apparatus is the provisionof an injector tube. for the pulverulent hydraulic material, of acertain diameter, extending horizontally through a com- 25 pressed airoperated exhaust and terminating in a closed collector, whereby the saidmaterial will be injected into the chamber in form of a mist or cloud.Coordinated with said injector tube are nonies for atomizing theliqueiled bituminous n the atomiaed material produced by the injectornozzles coincides with the longitudinal direction of the feed tube forthe hydraulic material.

I am aware that it is known to atomiae cementorthelikebymeansofaninjectorandtomix withit'water, alsothroughaninjector so as to produce a liquid pulp to be squirted onto walls ortheliketobeplastered. Iamalsoawarethat mortar. auch as a mixture o!cement. sand and 4 water,hasbeentreatedbyasquirtingprocessin likemanner.

Hy invention. however, is not concerned with a squirting process, butwith the production of a pulverulent product, the individual particlesof a which consisting of hydraulic material, are covered with a mistyillm o! bituminous material. Thialaccomplishbyproducinginaclosedchambertwo clouds which are caused to combine in auch a manner that the cloudof bituminous material is deposited onto the cloud of the pulverulenthydraulic binding material in form of a very thin nlm.

Two diametrically opposed atomizlng noasles for the liqueiled bituminousmaterial are ad- Il vantageouslyarrangedaboutmishwiththecenmaterial insuch a manner that the direction of (CL H) tral line ofthe feed pipe forthe pulverulent material and adjacent the discharge nozzle of said feedpipe so that two clouds are sure to form whichv will effectively andintimately mix.

The atomizing deviceV for the liquified bitu- 5 minous materialcomprises a tube submerged in the liquid to be atomized and a secondtube arranged at a right angle thereto for heated compressed air. Thecompressed air produced in a compressor and stored in a reservoir isconveyed through heated coils, as a result of which the bituminousmaterial will be completely changed into a fog or a cloud.

In themselves the atomization of bituminous material and the blowing ofsame against pulverulent material are known. Thus, for instance, it isknown to blow pulverulent material into a mixing vessel and to mix itwith pulverized bituminous material blown into it from the oppositedirection. But with such a process the object is to enrich poor asphaltrock With bitumen or to form briquettes by utilizing the viscousproperties of the bituminous material. For such purpose the ordinarysquirting nozzle may be used, as it suilices to4 disperse coarsebituminous material under pressure. With the present invention, however,the viscous property of the bitumen is disregarded. the main objectbeing to produce a bituminous cement powder.

The new apparatus lis equipped with means for effectively heating thecompressed air passing through the atomizing nozzles, means for evenlydistributing the materials in the collecting chamber and meansfordirecting the air current so that an'intimate mixing of both materialsis obtained.

My invention will be more fully understood by reference to theaccompanying drawing in which similar reference characters denotecorresponding parts and inwhich,

Fig. 1 is a front elevation partly in section of my 313981316118;

Fig. 2 is a plan view thereof; and

Pig. 3 is a vertical cross section on line III--III of Fig. l.

Referring in detail to the drawing i denotes the injector into whichprojects a nozzle I formed on a tube 2 leading from a ventilator 3 orthe like driven by an electric motor 4. The storage receptacle I for thepulverulent material. such as cement, lime or-the like, opens into achamber I in which are providedbeaters or stirrers mounted on a drivenshaft l. At the bottom of the 'chamberiisadistributorcomprisingadrumiimountedonashaftlandformedwithblades il. 'ma una n 1s driven by mem fseit and pulleys I3 and Il, the pulley Il being mounted ons shaft Itcarrying a pulley I1 which by which are iixed filtering bags 31.

belt Il is connected to aspeed change gear I3. The shaft I3' of saidgear I3 is driven from an electro-motor 2l. The material evenly passingfrom the distributor I into the injector I is drawn by the air currentpassing through the nozzle I' and is then, through tube 2l leading fromthe injector I. blown into the chamber 22 throughs conical mouthpiece 2Iformed at the end of said feed tube 2l and in which a distributing cone2 I is mounted.

Adjacent to chamber 22 is a heating device 23 for heating the bituminoussubstance. Projecting into the heating vessel 23' thereof are twovertical tubes 2l which project outwardly and terminate in nozzles 24'.At right angles to said nozzles 2l' are hot air nozzles 25 which incooperation with nozzles 2l', in well known manner, will cause theatomization of saidliquid bituminous material and will blow it into thechamber 22 through two openings 22' provided in the wall of the latterat both sides of the mouthpiece 2|'. The hot air nozzles communicatewith a tube 26 which leads through a reservoir 23 to a compressor 23. lThe iiow of air through tube 2B can be controlled by throttle and stopvalves.

The pulverulent material blown into the chamber 22 becomes intimatelymixed with the atomized bituminous material, and by providing suitabledrafts in the mouthpiece 2l it is possible to transform the pulverulentmaterial into a conical cloud. The cement or lime particles which in thechamber 22 become covered with a film of bituminous matter drop to thebottom of said chamber and are from here led by a worm conveyor 30 tothe collecting funnel 3l. To the mouth end 3| of said collector is fixeda bag 32 for receiving the product. 'I'he shaft 30' of the worm conveyoris driven through gears 33 from shaft 3l which through pulley 35 andbelt is driven from an electro-motor or the like (not shown). At the endof chamber 22 I provide an air filtering chamber 36, whose top andbottom are provided with apertures 36' to the edges 36z of A pipe 33leads from the air lter 3G to an exhaust (not shown) which sucks up theair. The pipe 33 may, however, be connected to the pipe 3' of theexhaust 3 to produce air circulation. The matter left over in the airfilter 36 drops into the funnel 39 `.and through the discharge 33thereof is collected in the bag 40 iixed thereto.

At the bottom of the filtering chamber 33 there may be a worm conveyor(notshown) to transfer the material back to funnel 3|.

In the foregoing I have described one modiiication of my invention. Itis, of course. obvious that various changes may be made in theconstruction without departing from the principle of my invention and I,therefore, do not wish to restrict myself to the details of constructionshown and described.

What I claim is:

1. An apparatus for producing a pulverulent hydraulic binder, preferablycement or the like, containing bituminous constituents, comprising aclosed mixing chamber, a horizontal injector pipe leading into, saidchamber, a compressed air exhaust communicating with said injector pipefor pneumatically feeding the pulverulent material into said mixingchamber, means on said injector pipe for dispersing said material insaid chamberA iniormofacloudormistandmeansforatomising liquenedbituminous material and dispersing the same in said closed chamber. saidlast named means being arranged relative to one another so that thedirection of the atomizing current coincides with the longitudinalfeeding direction of the pulverulent material, and comprising twodiametricaliy opposed atomizing nozzles arranged close to the dispersingmeans of said injector pipe and flush with the central longitudinal linethereof.

2. An apparatus for producing a pulverulent hydraulic. binder,preferably cement or the like. containing bituminous constituents,comprising a closed mixing chamber, means for pneumatical- 1y feedingpulverulent hydraulic material toward said chamber, means for dispersingsaid material in said chamber in form of a cloud or mist, and atomizingmeans for dispersing liquefied bituminous material in said closedchamber, said two last named means being so arranged relative to oneanother that the direction of the atomizing current coincides with thelongitudinal feeding direction of the pulverulent hydraulic material.and Y said atomizing means for the liqueed bituminous materialcomprising a tube formed with a nozzle and submerged in the liquefiedmaterial and a second compressed air feed tube formed with a nozzle at aright angle to the first, and heating means for heating the compressedair passing through Said second nozzle.

3. A method of producing a pulverulent hydraulc binder having bituminousconstituents, consisting in injecting pulverulent material in form of amist or cloud into a closed chamber, atomizing liquefied bituminousmaterial and forcing the same by heated currents of compressed air intosaid closed chamber at both sides of the current of the pulverulentmaterial so that said currents will coincide with the feed direction ofsaid pulverulent material, whereby said bituminous material will bedeposited in form of a fine film on the individual particles of thehydraulic material.

4. A method of producing a pulverulent hydraulic binder havingbituminous constituents, consisting in dispersing into a mixing chambera pulverulent hydraulic material in form of a cloud and in dispersinginto said chamber an atomized y bituminous substance in form of a cloudso that the particles of the latter will be deposited onto the particlesof the hydraulic material in form of a fine film.

5. An apparatus for producing a pulverulent.

Vform of a mist or cloud, so that said bituminous material will becomedeposited as a fine film on the particles of the hydraulic material,collecting means in said chamber, and means for conveying the mixtureprecipitating on the bottom of said chamber to said collecting means.

6. An apparatus for producing a pulverulent hydraulic binder havingbituminous constituents. comprising a mixing chamber, means for feedingsaid pulverulent hydraulic material toward said chamber having means fordispersing the same into said chamber in form of a mist or cloud, meansfor atomizing liquefied bituminous material and dispersing same intosaid chamber in form of a mist or cloud, so that said bituminousmaterial will become deposited as a tine lm on the particles of thehydraulic material, collecting means in said chamber, means forconveying the mixture precipitating on the bottom of said chamber tosaid collecting means, air filtering means communicating with saidchamber, and means for collecting the particles of the mixture remainingin said filtering means.

7. A method of producing a pulverulent hydraulic binder consisting inthe separate atomand in the mixing of the clouds formed by said atomizedsubstances.

8. A method of producing a pulverulent hydraulic binder consisting inthe separate atomization of Portland cement and accessories and in themixing of the clouds formed by said atomized substances.

9. The method of producing a pulverulent hydraulic binding mediumcontaining uniformly distributed bituminous constituents which consistsin producing an atomized fog of the bituminous constituents andinjecting particles of pulverulent hydraulic binding medium into saidfog to effect uniform distribution of the bituminous constituentsthroughout the hydraulic binding agent.

10. The method of producing a pulverulent hydraulic binding mediumcontaining bituminous constituents uniformly distributed throughout thesaid medium which consists in injecting pulverulent binding medium intoan atmosphere of atomized bituminous constituents.

1l. 'I'he method of producing a pulverulent hydraulic binding mediumcontaining uniformly distributed bituminous constituents which comprisesiniecting a cloud of pulverulent binding medium into an atomized fog ofthe bituminous constituents.

12. The method of producing a pulverulent hydistributed bituminousconstituents which consists in injecting a pulverulent cloud of cementinto an atmosphere ot atomized bitumen.

13. The method of producing a pulverulent hydraulic binding mediumcontaining uniformly distributed bituminous constituents, whichcomization of the different constituents of the binder draulic bindingmedium containing uniformly prises injecting a bituminous substance intoa chamber in atomized form and simultaneously spraying into said chambera pulverulent hydraulic binding medium the said bituminous substance andthe said binding medium being introduced into the chamber by means ofjets similarly directed.

14. A method of producing a puverulent bullding material consisting inthe separate atomization of the diierent constituents of said materialand in the mixing of the clouds formed by .said atomized substance.

15. A method of producing a pulverulent building material consisting inthe separate atomization of the base substance and of the accessories ofsaid material to form separate clouds and in the intimate mixing of saidclouds one with the other.

16. In the method of producing a pulverulent medium the steps ofsimultaneously atomizing a pulverulent medium and a bituminous materialto form clouds thereof. and intimately intermingling the clouds thusformed to eilect uniform distribution with each other.

17. In an apparatus of the type described the combination comprising amixing chamber, compressed air means for atomizing a .pulverulent mediumand discharging it into said chamber, and compressed air means foratomizing a bituminous material and discharging it into said chamber inintimate mixture with the atomized pulverulent medium.

18. A pulverulent cementitious composition having the hydraulicproperties of a substantially pure hydraulic cement and being, when set,insensitive to shocks and temperature changes, said composition beingcomposed of an inorganic pulverulent hydraulic binding medium andorganic material consisting substantially of a bituminous substance, thecomposition consisting of an intimate mixture of said substances inwhich the bituminous substances are so extraordinarily uniformly andnely distributed that said mixture will on sifting pass through theiinest mesh sieve through which ordinary Portland cement can pass.

ALBERT SOMMER.

